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Finding the Fourth Proportional to 490,865.88, 736,216.80 and 135,915.78

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Solution

The fourth proportional to 490,865.88, 736,216.80 and 135,915.78 is: 203,850.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,865.88 : 736,216.80 = 135,915.78 : x
  2. Step 2: Convert to fraction form
    490,865.88/736,216.80 = 135,915.78/x
  3. Step 3: Cross multiply
    490,865.88x = 736,216.80 × 135,915.78
  4. Step 4: Simplify right side
    490,865.88x = 100,063,480,621.10
  5. Step 5: Solve for x
    x = 100,063,480,621.10/490,865.88
  6. Step 6: Final answer
    x = 203,850.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.